Methods and apparatus to provide presence information

ABSTRACT

Methods and apparatus to present presence information are disclosed. An example method includes receiving a request from a first user for presence information associated with a second user, analyzing information from a monitoring sensor associated with the second user to determine that the second user is available for communication with the first user using a first communication method and is unavailable for communication with the first user using a second communication method, and sending a message to the first user indicating that the second user is available for communication using the first communication method and is unavailable for communication using the second communication method.

RELATED APPLICATIONS

This patent arises from a continuation of U.S. patent application Ser.No. 11/693,537, entitled Methods and Apparatus to Provide PresenceInformation, which was filed on Mar. 29, 2007, and is herebyincorporated herein by reference in its entirety.

FIELD OF THE DISCLOSURE

This disclosure relates generally to communication systems and, moreparticularly, to methods and apparatus to provide presence information.

BACKGROUND

Recently, communication systems have included the ability to send andreceive information about the availability (e.g., presence) of users ofthe communication systems. The availability information indicates if auser has indicated that they are available for contact. For example,when a user first logs in to a communication system, they may be listedas available. Later, the user may select an option to indicate that theyare busy and are not available for communication.

Communication systems provide the ability to establish whitelists andblacklists regarding which other users are authorized to receiveinformation about the user's presence. Blacklists indicate which usersare to be blocked from receiving presence information. Whitelistsindicate which users are allowed to receive presence information (e.g.,when the user blocks all users from receiving presence information bydefault and then identifies certain areas to receive the pressureinformation).

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a block diagram of an example system for providing presenceinformation.

FIG. 2 is a block diagram of an example implementation of the richpresence server 116 of FIG. 1.

FIG. 3 is a flowchart representative of example machine readableinstructions that may be executed to implement the example rich presenceserver of FIGS. 1 and 2.

FIG. 4 is a flowchart representative of example machine readableinstructions that may be executed to implement the example rich presenceserver of FIGS. 1 and 2.

FIG. 5 is a flowchart representative of example machine readableinstructions that may be executed to implement the example rich presenceserver of FIGS. 1 and 2.

FIG. 6 is a flowchart representative of example machine readableinstructions that may be executed to implement the example rich presenceserver of FIGS. 1 and 2.

FIG. 7 is an illustration of an example user interface that may beprovided to a user monitoring presence information of others.

FIG. 8 is a block diagram of an example computer that may execute themachine readable instructions of FIGS. 3, 4, 5 and/or 6 to implement theexample system of FIG. 1 and/or the example rich pressure server ofFIGS. 1 and 2.

DETAILED DESCRIPTION

FIG. 1 is a block diagram of an example system 100 for providingpresence information. For example, the example system 100 providesquality of presence information about a first device 102 to a seconddevice 122. In general, the quality of presence information indicateswhether the first user (e.g., the presentity for which the presence isto be monitored) is available to be contacted for a messaging exchangewith the second user (e.g., a watcher that is to monitor the presence ofthe presentity). For example, a messaging exchange may occur between thefirst device 102 and the second device 122 and/or a messaging exchangemay occur between any two or more other devices associated with thefirst user and the second user. The example system 100 utilizesavailability rules provided by users of the first device 102, the seconddevice 122, one or more supervisors, one or more messaging providers,and/or any other authority to determine if the second device 102 isauthorized to received presence information about the first device 102and if the first device is available for contact by the second device122. In addition, the example system 100 utilizes the availability rulesto determine which communication methods that second device 122 may useto contact the first device 102. For example, the system 100 maydetermine that a first communication method is not available while asecond communication method is available.

The example system 100 of FIG. 1 includes the first device 102; one ormore sensors 104, 110, and 114; a network 106; a messaginginfrastructure 112, a rich presence server 116, one or more value addedresources 118, one or more application servers 120, and a second device122.

The first device 102 and the second device 122 of the illustratedexample are computing devices that allow users to participate inmessaging (e.g., text, audio, and/or video) communication sessions. Thefirst device 102 and the second device 122 may each be a desktopcomputer, a laptop computer, a mobile phone, a personal digitalassistant (PDA), a smart phone, a television transceiver (e.g., aninternet protocol television (IPTV) transceiver), gaming device, a voiceover internet protocol (VoIP) telephone, etc. The first device 102 andthe second device 122 of the illustrated example support one or moremessaging communication methods. For example, if the first device 102 isa mobile phone, the first device 102 may support voice communicationover a mobile phone network, text messaging over the mobile phonenetwork, instant messaging via an internet communication channel of themobile phone network, video conferencing via the mobile phone network,push-to-talk/walkie-talkie communication via the mobile phone network,etc.

The first device 102 and the second device 122 of the illustratedexample are capable of communicating with each other regardless ofwhether or not they are the same type of device. To enable suchcommunication, the first device 102 and the second device 122 of theillustrated example implement a messaging communication protocol. Forexample, the first device 102 and the second device 122 may eachimplement the AOL® open system for communication in real time (OSCAR)protocol. Persons of ordinary skill in the art will recognize that anyother past, present and/or future messaging protocol may be used suchas, for example, session initiation protocol (SIP), mobile statusnotification protocol (MSNP), extensible messaging and presence protocol(XMPP), the Yahoo!® messenger instant messaging protocol (YMSG), etc.

The first device 102 of the illustrated example is capable of reportinginformation about the presence of a first user of the first device 102to the rich presence server 116 via the network 106 and the messaginginfrastructure 112. For example, the first device 102 may allow thefirst user to specify that the first user is available for contact, isunavailable for contact, is available for contact by one or moreentities specified on a list of contacts, is available for contact forcertain topics, etc. In addition to sending presence informationactively provided by the first user to the rich presence server 116, thefirst device 102 also sends information (i.e., passively obtainedpresence information) retrieved from the one or more sensors 104 to therich presence server 116. The sensors 104 provide the passively obtainedpresence information to facilitate determining if the first user of thefirst device 102 is available for communication and are described infurther detail below.

The second device 122 of the illustrated example is associated with asecond user and is capable of requesting and/or presenting presenceinformation (which may be passively collected by the sensor 104 oractively provided by a user) associated with the first device 102. Theexample second device 122 of the illustrated example sends a request forpresence information to the rich presence server 116 via the messaginginfrastructure 112. In alternate examples, the second device 122 may beconnected to a second network (similar to the network 106) and/or may beconnected to network 106. The second device 122 of the illustratedexample receives presence information from the rich presence server 116that indicates whether the first user at the first device 102 isavailable for communication with the second device 122. If the richpresence server 116 indicates that the user at the first device 102 isavailable for communication, the second device 122 may initiate acommunication session with the first device 102 via the messaginginfrastructure 112 and the network 106. Additionally or alternatively,the second device 122 may receive quality of presence information thatis associated with the first user at the first device 102, which thesecond device 122 may use to determine the availability of the firstuser and/or the first device 102.

Persons of ordinary skill in the art will recognize that, while FIG. 1illustrates system 100 as including two devices, any number of connecteddevices may be used. For example, the first user may be associated witha first plurality of communication devices (e.g., a mobile telephone, aninstant messaging account for an instant messaging service, etc.) andthe second user may be associated with a second plurality ofcommunication devices (e.g., at least one device in common with thefirst plurality of communication devices). In addition, devices may beconnected to the network 106, the messaging infrastructure 112, and/orany other network or networks that may be available.

The one or more sensors 104 of the illustrated example provideinformation that is used by the rich presence server 116 to determine ifa user of the first device 102 is available for communication. Thesensors may be may be hardware sensors or may be any type of secondaryinformation about the environment or characteristics of a user of thefirst device 102. For example, any type of sensor or monitor may be usedsuch as, for example, a monitor of a user's web browsing activity, abackground noise sensor, a temperature sensor, a monitor of computerfiles being presented by the first device 102, a monitor of thecapabilities of the first device 102 (e.g., the capability to providevideo chat), a monitor of the number of persons in close proximity tothe first device 102, a monitor of the screen contrast of the firstdevice 102, an indication of a wireless signal strength, an indicationof the in which a user is partaking (e.g., driving an automobile), aglobal position system (GPS) device, etc. The sensors 102 may beintegrated in the first device 102 (e.g., software running on the firstdevice 102, hardware integrated in the first device 102, etc.) or may beseparate from the first device 102. For example, a sensor or monitorthat is separate from the first device 102 may be communicativelycoupled to the first device 102 via a wired or wireless connection.

The network 106 of the illustrated example is an internet protocol (IP)communication network. The example network 106 provides communicationbetween the first device 102 and the messaging infrastructure 112. Thenetwork 106 may be implemented by any type(s) of network(s) and/or maybe comprised of multiple coupled networks. The example network 106 ofFIG. 1 includes one or more sensors 110, which are described below.

The one or more override elements 108 of the illustrated example arenetwork elements such as edge gateways/proxies, filters, and/orfirewalls that may include presence access authorization information.For example, an override element 108 may be implemented by a residentialgateway or a network proxy where a parent has programmed white lists orblacklists based on specific parameters such as time of day, screennames, application that is currently being accessed, etc. In anotherexample, the one or more override elements 108 may be an enterprisefirewall that may block or have override control over the nature andquality of the presence information regarding the user based on, forexample, who it is being shared with and/or when and/or how theinformation is being shared. The one or more override elements 108 mayenforce access restrictions on presence information and/or may transmitthe access restriction information to the rich presence server 116.

The one or more sensors 110 of the illustrated example monitorcommunication on the network 106 and provide the results of themonitoring to the rich presence server 116. For example, the sensors 110may monitor the speed of communications on the network, the relativeload of the network 106, and/or any other type of information that mayrelate to the quality of communication sessions that are connected viathe network 106.

The messaging infrastructure 112 of the illustrated example comprisesone or more servers and/or networks that enable communication betweenmultiple devices connected to the messaging infrastructure 112 (e.g.,the first device 102 and the second device 122). The architecture of themessaging infrastructure 112 is dependent on the type(s) ofcommunication protocol(s) supported by the messaging infrastructure.

The one or more sensors 114 of the illustrated example monitor themessaging infrastructure 112 and/or the communication sessions that arehandled by the messaging infrastructure 112. The sensors 114 send theresults of the monitoring to the rich presence server 116 for use indetermining the presence level of a device (e.g., the first device 102).For example, the sensors 114 may monitor the relative load of one ormore messaging server(s), the relative load of one or moreauthentication server(s), the operational state of one or more messagingserver(s), the operational state of one or more authenticationserver(s), etc. In an alternate example, the sensors 114 and the sensors110 may be of the same type and/or may be the same device.

The rich presence server 116 of the illustrated example receivespresence information from the first device 102 and/or monitoring resultsfrom the one or more sensors 104, 110, and 114. Based on the receivedinformation the rich presence server 116 determines the availability ofa user at the first device 102. The example rich presence server 116also receives requests from the second device 122 for presentation ofthe presence information. The example rich presence server 116 of FIG. 1evaluates rules stored at the rich presence server 116 to determine ifthe second device 122 is authorized to be informed of the presencestatus of the user of the first device and, if so, sends the presenceinformation to the second device 122. An example implementation of therich presence server 116 is described in further detail in conjunctionwith FIG. 2.

The rich presence server 116 of the illustrated example is capable ofstoring one or more authorization rules defining users who are permittedto view a given messaging user's presence information. For example, therich presence server 116 may store a set of rules set by the user, by asupervisor or proxy (e.g., parent, guardian, employer, etc.), by themessaging provider, set by a network provider, and/or by any otherentity. The rich presence server 116 is capable of integrating two ormore sets of rules and/or employing the integrated set of rules todetermine if a particular device requesting presence information isauthorized to receive the presence information. In the case of a ruleconflict, the server 116 of the illustrated example may default todisallow communication of the presence information. In addition, therich presence server 116 of the illustrated example is capable ofdetermining how much presence information the requesting device isauthorized to receive. For example, the rules may indicate that the richpresence server 116 should send a message to a device requestingpresence information for a user indicating that presence informationcannot be provided (e.g., the device is not authorized to receivepresence information), to send a message to another device indicatingthat the user is not available for communication, and/or to send amessage to yet another device indicating that the user is available forcommunication. In a further example, the rich presence server 116 mayevaluate the rules to determine that a first user is authorized toreceive qualitative information indicating that a user is not availablefor communication because the user is working on schoolwork for aparticular class, a second user is authorized to receive informationindicating only that the user is working on schoolwork, and a third useris authorized to receive information indicating only that the user isunavailable. In other words, the rich presence server 116 is capable ofdetermining the level of presence information that should be provided.

The rich presence server 116 is capable of selecting between themultiple communication methods available for a user of the first device102. For example, the rules established for the first device 102 (e.g.,rules associated with a user of the first device 102) may indicate thatthe user is not available for communication using a first communicationmethod (e.g., the user is not available for text messaging because theuser is driving an automobile). However, the rules may indicate that theuser is available for a communication using a second communicationmethod (e.g., the user is available for communication via telephonebecause the user is equipped with a hands-free device that allowscommunication while driving). In addition, the rich presence server 116may evaluate received rules to determine communication priority (e.g.,priority among communication methods, priority among communicationparticipants, etc.) at a particular instant in time. For example, therich presence server 116 may determine that a first communicationsession with a first communication method should be disconnected when asecond, preferred, communication method becomes available. Similarly,the rich presence server 116 may determine that a communication betweenthe first device 102 and the second device 122 should be disconnectedand a communication session between the first device 102 and a thirddevice be connected when the third device is a preferred device.

While the rich presence server 116 in some example implementations mayevaluate received quality of presence information (e.g., informationreceived from the first device 102, the sensors 104, the overrideelements 108, etc.), the rich presence server 116 may alternativelyevaluate rules to determine what presence information should be sent toa requesting device (e.g., the second device 122). For example, the richpresence server 116 may evaluate the received and/or stored rules todetermine that a first requesting device is authorized to receive allavailable quality of presence information and that a second requestingdevice is authorized only to receive vague information. When the richpresence server 116 does not evaluate the received quality of presenceinformation to determine availability, the devices (e.g., the seconddevice 122) that receive the quality of presence information willevaluate the quality of presence information to determine availablecommunication methods.

While the example rich presence server 116 is illustrated as a singledevice, in alternate examples the rich presence server 116 may beimplemented as several devices connected to the network 106 and/or themessaging infrastructure 112. For example, the rich presence server 116may be implemented as a supplement server to a presence server that isnot capable of monitoring sensors and multiple presence authorizationlists.

The one or more value added resources 118 of the illustrated example areresources in the messaging infrastructure 112 the provide capabilitiessuch as transcoding (of multimedia), compression capabilities (for videoor voice), Quality of service monitoring (QoS), caching and storage,providing subscription information relating to roaming and charging,language translation, etc. A user may wish to incorporate the status oravailability of these resources in order to make a qualitativedetermination about the presence information. Accordingly, the contentof these resources may be transmitted to and/or may be accessible by therich presence server 116.

The one or more application servers 120 of the illustrated example areone or more servers that provide one or more applications to one or moreend users (e.g., a user at the first device 102). For example, the oneor more application servers may render content, enable voice or videotelephony, and/or provide instant messaging. The one or more applicationservers 120 of the illustrated example incorporate the presence andavailability information in the context of the application. For example,the one or more application servers 120 may include an instant messagingserver that provides a contact list that includes information aboutwhether the contacts identified in the contact list are available.

FIG. 2 is a block diagram of an example implementation of the richpresence server 116 of FIG. 1. The example rich presence server 116includes a messaging transceiver 202, a request receiver 204, a presencehandler 206, a sensor monitor 208, a clock 210, a profile store 212, arule store 214, a message generator 216, a message/avatar store 218, andan administration server 220.

The messaging transceiver 202 of the illustrated example communicativelycouples the rich presence server 116 with the messaging infrastructure112 of FIG. 1. The example messaging transceiver 202 receives monitoringinformation from the one or more sensors 104, 110, and/or 114, and/orreceives requests (e.g., requests for presence information, requests tochange presence status, etc.). The example messaging transceiver 202transmits sensor monitoring information to the sensor monitor 208. Theexample messaging transceiver 202 also transmits presence information(e.g., messages indicating the presence status of a device) via themessaging infrastructure 112.

The request receiver 204 of the illustrated example receives requestsfrom devices (e.g., requests for presence information, requests tochange presence status, etc.) and determines the identity of the sourceof the request. For example, a request may include a username associatedwith the source of the request. In another example, the request receiver204 may determine a network address where the request originated. If therequest is a request for presence information of a user other than theuser at the originating point of the request, the request receiverdetermines the identity of the requested user. The request receiver 204sends the request and the identity information to the presence handler206.

When the presence handler 206 of the illustrated example receives arequest and identity information and processes the received data tosatisfy the request. For example, if the request is to update thepresence of a user, the presence handler edits the presence informationstored in the profile store 212 associated with the source of therequest. In another example, if the request is a request for presenceinformation associated with a requested user, the presence handlerretrieves information from one or more of the sensor monitor 208, theclock 210, the profile store 212, and the rule store 214 and processesthe information to determine if the requesting user is authorized toreceive the requested information and, if so, what presence informationshould be sent to the requesting user.

The sensor monitor 208 of the illustrated example receives and storesinformation received from the one or more sensors 104, 110, and/or 114of FIG. 1. When requested, the sensor monitor 208 sends sensorinformation to the presence handler 206. For example, the sensor monitor208 also may include a database that stores sensor informationassociated with a particular user, a particular network, and/or aparticular messaging infrastructure. In addition, the sensor monitor 208may be capable of determining which sensor information is associatedwith a particular user (e.g., which network sensors are associated witha network to which the user's device is connected, etc.). Alternatively,the presence handler 206 may be capable of requesting information fromspecific sensors that the presence handler 206 has determined arerelevant to a particular request.

The clock 210 of the illustrated example provides the current time anddate, which may be used for evaluating rules at the presence handler206. For example, a rule stored in the rule store 214 may indicate thata user (e.g., a child) is available for general communication between 3PM and 5 PM on weekdays, is available for communication regarding homebetween 5 PM and 8 PM, but is unavailable for general communicationbetween 5 PM and 8 PM.

The profile store 212 of the illustrated example stores profileinformation associated with one or more users of the messaginginfrastructure 112 for which presence information is monitored. Inaddition, the example profile store 212 stores the current presencestatus (e.g., quality of presence information associated with one ormore communication methods) reported and monitored by devices (e.g., thefirst device 102 of FIG. 1). The profile information may include ageinformation for a user, information about supervisors of a user,information about sensors that are associated with the user, informationabout which devices have subscribed to monitor the presence status ofthe user, etc. The information stored in the example profile store 212may be modified by requests from the first device 102 (e.g., a change inpresence status), via the administration server 220, by a messagingprovider, etc.

The rule store 214 of the illustrated example stores rules associatedwith the handling of presence information. The example rule store 214 isa database that associates one or more static and/or dynamic rules withusers. The rules stored in the rule store 214 may include one or moreblacklists (e.g., a list that indicates which users/devices are notallowed to receive presence information for one or more other specifiedusers), one or more whitelists (e.g., a list that indicates whichusers/devices are allowed to receive presence information for one ormore other specified users, one or more greylists (e.g., a list thatindicates that users are allowed to receive some, but not all presenceinformation for one or more other specified users), etc. In addition tolists, the example rules store 214 may include one or more rules toqualitatively determine the presence status of a user. For example, arule may indicate that when available sensors indicate that thebackground noise associated with a given device is above a certainlevel, the corresponding user should be reported as unavailable foraudio communication (though the user may be reported as available forother types of communication). In another example, a rule may indicatethat if a corresponding user is viewing one or more webpages related toschoolwork, the user is available for contact regarding schoolwork, butis unavailable for contact regarding other topics.

The rule store 214 of the illustrated example is capable of storingconflicting rules for a user that are associated with different rulesources. For example, the rule store 214 may store a first ruleindicating that a user is available for contact between 8 AM and 8 PM(e.g., a rule set by a user) and a second rule indicating that a user isnot available for contact between 5 PM and 8 PM (e.g., a rule set by aparent of the user). The presence handler 206 will use information aboutthe source of the rules to determine how to resolve the rules conflict.For example, the presence handler 206 may determine that rules set by aparent should always override rules set by the user. For conflictingrules set by authorities of the same level, the presence handler 206 maydefault to disallowing the information (i.e., performing an ANDoperation on the rules).

The rule store 214 of the illustrated example is capable of storingrules establishing priorities for communication at any given instant intime. The rules may establish a priority of communication methods. Forexample, communication via a telephone may be preferred to communicationvia text messaging. The rules may establish communication methodpriorities for each possible communication partner. The rules may bedependent upon a number of external or intrinsic factors such as, forexample, the location of the user, other tasks the user is performing,ambience, etc. For example, communication via telephone may be preferredwith a first communication partner and communication via text messagingmay be preferred with a second communication partner. Additionally oralternatively, the rules may establish a priority for communicationpartners. For example, communication with a first communication partnermay be preferred to communication with a second communication partner.Therefore, if communication is occurring with the second communicationpartner at a time when the first communication partner requests acommunication session, the communication session with the secondcommunication partner may be terminated and a communication session withthe first communication partner may be initiated. Priorities may becommunicated to users requesting presence information or, alternatively,non-preferred communication methods may be reported as unavailable.

The message generator 216 of the illustrated example receives presenceinformation from the presence handler 206 and generates a messageindicating the presence status (e.g., available, unavailable, blocked,etc.) for transmission to the user requesting the presence information.The example message generator 216 formats the message as an extensiblemarkup language (XML) message. The XML message format allows the messagegenerator 216 to generate messages that can be read by multiple numberand/or types of communication clients. Alternatively, the messagegenerator 216 may generate messages in one or more other, possiblyproprietary, past, present and/or future message formats.

The example message generator 216 of FIG. 2 retrieves message and avatarinformation from the message/avatar store 218. Messages and/or avatarsretrieved from the message/avatar store 218 may be incorporated in thegenerated presence message. For example, the message/avatar store 218may store a particular message that should be sent when a particularuser is not available for communication. Additionally or alternatively,the message/avatar store 218 may store a particular avatar that shouldbe sent when the particular user is available for a particular type ofcommunication.

After generating the one or more messages, the message generator 216sends the generated messages to the messaging transceiver 202 fortransmission to the requesting user/device.

The message/avatar store 218 of the illustrated example stores messagesand/or avatars that may be used in presenting presence information. Forexample, the message/avatar store 218 may store a set of messages thatmay be used to present presence information for a particular type ofcircumstance (e.g., a blocked avatar). Additionally and alternatively,the message/avatar store 218 may store a set of avatars that may be usedto present presence and availability information for a particular user.The message/avatar information may be administered via theadministration server, may be received from the messaging device (e.g.,the first device 102), and/or may be downloaded or modified in any otherway.

The administration server 220 of the illustrated example enablesadministration of the information stored in the rich presence server116. The example administration server 220 of FIG. 2 provides a webserver for serving one or more web pages that enable modification of thestored information. For example, the administration server 220 mayrequire a user or a proxy/supervisor to login with an assigned username,password, and/or other authentication mechanism. Upon successfullylogging in, the user may be presented with a list of options regardingwhich information is to be modified. For example, the user may select tomodify the rules information. The user is then presented with thecurrent set of rules and provided the option to modify the rules. Theexample administration server 220 restricts users from changing rulesthat were not created by that user and/or that were created by a userwith a higher level of authorization. For example, if a child logs in tothe administration server 220 they will not be allowed to modify rulesestablished by their parent. While the administration server 220 isdescribed as a web server, any other type of implementation allowing auser to modify information stored in the rich presence server 116 mayalternatively be used.

FIGS. 3-6 are flowcharts representative of example machine readableinstructions that may be executed to implement the example first device102, the example one or more sensors 104, 110, and 114, the examplemessaging infrastructure 112, the example rich presence server 116, theexample value added resources 118, the example application servers 120,and/or the example second device 122 of FIG. 1, and/or to implement theexample request receiver 204, the example presence handler 206, theexample sensor monitor 208, the example message generator 216, and/orthe example administration server 220 of FIG. 2. The example machinereadable instructions of FIGS. 3-6 may be executed by a processor, acontroller, and/or any other suitable processing device. For example,the example machine readable instructions of FIGS. 3-6 may be embodiedin coded instructions stored on a tangible medium such as a flashmemory, or random access memory (RAM) associated with a processor (e.g.,the processor 1012 shown in the example processor platform 1000 anddiscussed below in conjunction with FIG. 8). Alternatively, some or allof the example flowcharts of FIGS. 3-6 may be implemented using anapplication specific integrated circuit (ASIC), a programmable logicdevice (PLD), a field programmable logic device (FPLD), discrete logic,hardware, firmware, etc. In addition, some or all of the exampleflowcharts of FIGS. 3-6 may be implemented manually or as combinationsof any of the foregoing techniques, for example, a combination offirmware, software, and/or hardware. Further, although the examplemachine readable instructions of FIGS. 3-6 are described with referenceto the flowcharts of FIGS. 3-6, persons of ordinary skill in the artwill readily appreciate that many other methods of implementing theexample first device 102, the example one or more sensors 104, 110, and114, the example messaging infrastructure 112, the example rich presenceserver 116, the example value added resources 118, the exampleapplication servers 120, the example second device 122, the examplerequest receiver 204, the example presence handler 206, the examplesensor monitor 208, the example message generator 216, and/or theexample administration server 220 may be employed. For example, theorder of execution of the blocks may be changed, and/or some of theblocks described may be changed, eliminated, sub-divided, and/orcombined. Additionally, persons of ordinary skill in the art willappreciate that the example machine readable instructions of FIGS. 3-6be carried out sequentially and/or carried out in parallel by, forexample, separate processing threads, processors, devices, circuits,etc.

FIG. 3 is a flowchart representative of example machine readableinstructions that may be executed to implement the example rich presenceserver 116 of FIGS. 1 and 2. The example machine readable instructionsof FIG. 3 begin when the example request receiver 204 of FIG. 2 receivesa request associated with presence information (block 302). The requestreceiver 204 or the presence handler 206 determines if the request isassociated with a presence subscription (e.g., a request from the seconddevice 122 of FIG. 1 to monitor the presence status of the first device102) or a presence status change (e.g., a message from the first device102 indicating that the presence status of a user of the first device102 should be changed) (block 304).

If the request is a presence subscription request (block 304), controlproceeds to the machine readable instructions illustrated in FIG. 4. Ifthe request is a presence status change request, control proceeds to themachine readable instructions illustrated in FIG. 5. After the machinereadable instructions illustrated in either FIG. 4 or FIG. 5 arecompleted, control returns to block 302 to await further requests.Persons of ordinary skill in the art will recognize that multiplerequests may be received and queued for processing or processedsimultaneously in parallel threads.

FIG. 4 is a flowchart representative of example machine readableinstructions that may be executed to implement the example rich presenceserver 116 of FIGS. 1 and 2. As described in conjunction with FIG. 3,the machine readable instructions of FIG. 4 are executed to handle arequest for a subscription to presence information. The example machinereadable instructions of FIG. 4 begin when the presence handler 206 ofFIG. 2 determines the identity of the source of the request (i.e., thewatcher) (block 402). For example, the request may include a username(e.g., an instant messaging screen name) of the user that initiated thesubscription request. The example presence handler 206 then determinesthe identity of the subject of the request (i.e., the user/device forwhich the presence is to be monitored by the source of the request)(block 404).

After determining the source and subject of the request, the presencehandler 206 retrieves rules from the rule store 214 associated with thesubject of the request (block 406). The presence handler 206 thenretrieves profile information associated with the subject of the requestfrom the profile store 212 (block 408). Then the presence handler 206retrieves information from the first sensor (e.g., one of the sensors104, 110, and/or 114) listed in the profile from the sensor monitor 208(block 410). The presence handler 206 then determines if there arefurther sensors listed in the profile (block 412). If there are furthersensors listed in the profile, control returns to block 410 to retrieveinformation from the next sensor.

If there are no further sensors listed in the profile (block 412), thepresence handler 206 applies the rules with the sensor information todetermine if the subject presence should be reported to the source ofthe request (block 414). For example, the presence handler 206 may mergetwo conflicting rules by overriding a lower priority rule (e.g., a ruleset by an employee) with a higher priority rule (e.g., a rule set by anemployer of the employee). In addition, the presence handler 206 maydetermine if the rules indicate that based on the sensor data, thepresence should not be reported. For example, the rules may indicatethat presence data should not be reported after a certain time of day,should not be reported when the subject is browsing a particular websiteor type of website, should not be reported when the subject is using amobile phone, should not be reported when the subject is in a publicplace, etc. Based on the application, the presence handler 206determines if the rules and/or sensor information indicate that thepresence information should be reported to the source of the request(block 416). If the presence data should not be reported to the sourceof the request, the message generator 216 generates and sends a messageindicating that presence information is not available to the source forthe subject (block 418). Control then returns to block 302 of FIG. 3.

If the presence data should be reported to the source of the request(block 416), the presence handler 206 applies the rules with the sensorinformation to determine if the subject is available to the source ofthe request (block 420). For example, the subject may report that theyare generally available, the sensors may indicate that the user isbrowsing a science related website, and the rules may indicate that thesubject is only available for contact by others that are browsingsimilar websites. Accordingly, while the subject is generally available,if the source of the request is not browsing a similar website, thepresence may be reported as not available. In another example, a subjectmay report that they are generally available, but a rule set by asupervisor (e.g., a parent, an employer, etc.) may indicate that thesubject is not available for communication during set time interval(s).Accordingly, if the current time is within such a time interval, thesubject presence will be reported as unavailable for communication. Thepresence handler 206 determines if the rules and the sensor informationindicate that the subject is available for communication with the sourceof the request (block 422). If the rules and the sensor informationindicate that the subject is not available for communication with thesource, the message generator 216 generates and sends a message to thesource of the request indicating that the subject is not available(block 426) and control proceeds to block 428. For example, the messagegenerator 216 may query the message/avatar store 218 to determine amessage or avatar associated with the subject that indicates that thesubject is not available for communication (e.g., a message that reads“This user is currently unavailable for contact,” an image of a slashthrough a red circle, etc.).

While blocks 422-426 describe a single indication of availability, itshould be understood that the presence handler 206 may iterate throughavailable communication methods to report presence and availabilityinformation for each of the communication methods. For example, thepresence handler 206 may report that a first communication method is notavailable, but may report that a second communication method isavailable based on the rules.

If the rules and the sensor information indicate that the subject isavailable for communication with the source of the request (block 422),the message generator 216 generates and sends a message to the source ofthe request indicating that the subject is available for communication(block 424). The message may include specific attributes of presence andavailability information that results from the application of the rulesand inputs received from sensors, etc. One example attribute can beindicative of “this user is available for communication only via emailat the present time” or “this user is available for 15 minutes at thisphone number XXX-XXX-XXXX”, etc. For example, the message generator 216may query the message/avatar store 218 to determine a message or avatarassociated with the subject that indicates that the subject is availablefor communication (e.g., a message that reads “This user is currentlyavailable for communication,” an image of a smiley face, etc.).

After the message generator 216 sends a message indicating the presencestatus of the subject (e.g., block 424 or block 426), the presencehandler 428 stores the subscription information for the source of therequest in the profile store 212 (block 428). For example, the presencehandler 428 may store the subscription information in a recordassociated with the subject of the request. Accordingly, when thepresence status of the subject of the request changes, the presencehandler 206 can send a message to the source of the request indicatingthat the presence status has changed. Such a status change can betriggered by a change in the information provided by one of the sensors,rules database, or other means. Control then returns to block 302 ofFIG. 3.

FIG. 5 is a flowchart representative of example machine readableinstructions that may be executed to implement the example rich presenceserver 116 of FIGS. 1 and 2. As described in conjunction with FIG. 3,the machine readable instructions of FIG. 5 are executed to handle arequest for a change in presence status (i.e., a change in the state ofthe presence information (e.g., from available to unavailable)), whichincludes sending the updated status to users that are subscribed towatch the presence information. The machine readable instructions ofFIG. 5 begin when the presence handler 206 of FIG. 2 determines theidentity of the source of the presence status change request (block502). If the source is authorized to make a change, the presence handler206 then stores the updated status in the profile store 212 (block 504).

After storing the updated presence status (block 504), the presencehandler 206 retrieves one or more rules associated with the source ofthe request from the rule store 214 (block 506). Then, the presencehandler 206 retrieves the profile associated with the source of therequest from the profile store 212 (block 508). The presence handler 206then retrieves sensor information from the first sensor listed in theprofile (block 510). Next, the presence handler 206 determines if thereare further sensors listed in the profile (block 512). If there arefurther sensors listed in the profile, control returns to block 510 toretrieve information from the next sensor (block 514).

If there are no further sensors listed in the profile (block 512), thepresence handler 206 retrieves a list of subscribed watchers (e.g.,users/devices that have subscribed to receive presence information aboutthe source of the request) from the profile (block 514). The presencehandler 206 then applies the rules and the sensor information todetermine if the update on the presence status should be reported to thefirst subscribed watcher (block 516). If the rules and the sensorinformation indicate that the presence information should not bereported to the first subscribed watcher, the presence handler 206determines if there are further subscribed watchers listed in theprofile (block 520). If there are further subscribed watchers listed inthe profile that might be impacted by the change in the availabilitystatus, control returns to block 516 to process the next subscribedwatcher. If there are no further subscribed watchers, control returns toblock 302 of FIG. 3.

If the rules and sensor information indicate that the presenceinformation should be reported to the first subscribed watcher (block518), the presence handler 206 applies the rules and sensor informationto determine if the source is available to the subscribed watcher (e.g.,if the source is available to participate in a communication sessionwith the subscribed watcher and/or other devices) (block 522). Thepresence handler 206 then determines if the applied rules and sensorinformation indicates that the source should be reported as available tothe subscribed watcher (block 524). If the rules and the sensorinformation indicate that the source is not available to the subscribedwatcher, the message generator 216 generates and sends a message to thesubscribed watcher indicating that the source is unavailable forcommunication (block 526). Control then proceeds to block 530.

If the rules and the sensor information indicates that the source isavailable to the subscribed watcher (block 524), the message generator216 generates and sends a message to the subscribed watcher indicatingthat the source is available for communication (block 528). The messagewill include specific attributes of presence and availabilityinformation that results from the application of the rules and inputsreceived from sensors, etc. Control then proceeds to block 530.

While blocks 524-528 describe a single indication of availability, itshould be understood that the presence handler 206 may iterate throughavailable communication methods to report presence and availabilityinformation for each of the communication methods. For example, thepresence handler 206 may report that a first communication method is notavailable, but may report that a second communication method isavailable based on the rules.

After sending a message indicating the presence status to the subscribedwatcher (block 526 or block 528), the presence handler 206 determines ifthere are further subscribed watchers listed in the profile associatedwith the source of the presence status change request (block 530). Ifthere are further subscribed watchers, control returns to block 516 toupdate the subscribed watchers. Each subscribed watcher may receivedifferent messages of the availability information. If there are nofurther subscribed watchers, control returns to block 302 of FIG. 3.

FIG. 6 is a flowchart representative of example machine readableinstructions that may be executed to implement block 420 of FIG. 4and/or block 522 of FIG. 5. The example machine readable instructions ofFIG. 6 iterate over the available communication methods to provideavailability information for each communication method. The examplemachine readable instructions of FIG. 6 begin when the presence handler206 retrieves a list of available communication methods from the profilestore 212 (block 602). For example, the communication methods mayinclude video conferencing, text messaging, one or more instantmessaging protocols, audio communication, etc. The presence handler 206then determines if the sensor data indicates that the user/device to bereported is available to use the communication method (block 604). Forexample, the sensor data may indicate that the background noise levelfor the user/device is too high or the room lighting is inappropriatefor a videoconferencing communication session. In another example, thesensor data may indicate that the user is unavailable for text messagingbecause the user is available for instant messaging (e.g., isunavailable to use a pay-per-use communication method when a freeservice is available).

The presence handler 206 then determines if the rules indicate that thecommunication method is currently available (block 606). For example,the rules may indicate that the user/device is unavailable for textmessaging between certain times but is available for instant messagingduring that time. The presence handler 206 then combines the sensordetermination and the rules determination (block 608). For example, thepresence handler 206 may determine that the user/device is unavailablefor a particular communication method if either the rules or the sensordata indicates that the user/device is unavailable. Alternatively, thepresence handler 206 may determine that a user/device is available ifthe rules indicate that the user/device is available even though somesensor information indicates that the communication method may not bedesirable.

The presence handler 206 then determines if there are furthercommunication methods to be evaluated (block 610). If there are furthercommunication methods available, control returns to block 604. If thereare no further communication methods available, control returns to block422 and/or block 524 with the list of communication methods and theirassociated presence status.

FIG. 7 is an illustration of an example user interface 700 that may beprovided to a user monitoring presence information of others. Forexample, the user interface may be provided to the second device 122.The example user interface includes a title bar 702, a list of devices704, a list of contacts 706, and a list of communication methods 708.

The title bar 702 includes the name of the user (e.g., Andy Black is thename of the user of the example device) and the presence status of thatuser (i.e., the status that will be reported to other users monitoringthe presence of the user).

The list of devices 704 provides a symbol representative of the devicecorresponding to the contact listed in the list of contacts 706. In theillustrated example, the contact Mary Jones is associated with a mobiletelephone and the user John Smith is associated with a computer. Whilethe example user interface includes a single device associated with eachcontact, each contact may alternatively be associated with multipledevices.

The list of devices 704 also includes a symbol indicating theavailability of the contact (e.g., the contacts device). In theillustrated example, a checkmark indicates that the device is availablefor contact by the user and an “X” indicates that the device is notavailable for contact by the user. A device may be indicated asavailable when a first communication method in the list of communicationmethods 708 is available even though a second communication method inthe list of communication methods 708 is not available (i.e., the userof the device is available whenever at least one communication method isavailable). Alternatively, as is illustrated in the example userinterface 700, a device may be indicated as available only when the userof the device is available for live communication. In other words, thedevice will be listed is available when the user is present and canparticipate in a live communication session but will be listed asunavailable when no communication methods are available and/or when onlynon-realtime communication methods are available (e.g., voicemail, textmessaging, etc.).

The list of communication methods 708 lists all communication methodsthat are available and hides communication methods that are notavailable. Alternatively, the list of communication methods 708 may listcommunication methods that are not available and display them grayedout, display them with a symbol indicating the unavailability, etc. Thecommunication methods may be hidden using the drop down selection 710.The drop down selection 710 allows more contacts to be displayed whileallowing the option of viewing the entire list of communication methods708.

The user of the example user interface 700 can initiate a communicationsession using a particular method by dropping down the list ofcommunication methods 708 using the drop down selection 710 andselecting a communication method. For example, if the user selects tovideo conference for a contact, a video conference session request issent to the device associated with the contact.

The example user interface 700 includes scrollbar 712 to enable a userto view the list of available contacts 706 and the list of availablecommunication methods 710 when the lists are longer than the availablescreen size.

FIG. 8 is a block diagram of an example computer platform 1000 capableof executing the machine readable instructions illustrated in FIGS. 3,4, 5 and/or 6 to implement the system 100, the rich presence server 116,and/or the other apparatus and/or methods disclosed herein.

The computer platform 100 of the instant example includes a processor1012 such as a general purpose programmable processor. The processor1012 includes a local memory 1014, and executes coded instructions 1016present in random access memory 1018, coded instruction 1017 present inthe read only memory 1020, and/or instructions present in another memorydevice. The processor 1012 may execute, among other things, the machinereadable instructions represented in FIGS. 3, 4, 5, and/or 6. Theprocessor 1012 may be any type of processing unit, such as amicroprocessor from the Intel® Centrino® family of microprocessors, theIntel® Pentium® family of microprocessors, the Intel® Itanium® family ofmicroprocessors, and/or the Intel XScale® family of processors. Ofcourse, other processors from other families are also appropriate.

The processor 1012 is in communication with a main memory including avolatile memory 1018 and a non-volatile memory 1020 via a bus 1025. Thevolatile memory 1018 may be implemented by Synchronous Dynamic RandomAccess Memory (SDRAM), Dynamic Random Access Memory (DRAM), RAMBUSDynamic Random Access Memory (RDRAM) and/or any other type of randomaccess memory device. The non-volatile memory 1020 may be implemented byflash memory and/or any other desired type of memory device. Access tothe main memory 1018, 1020 is typically controlled by a memorycontroller (not shown) in a conventional manner.

The computer platform 1000 also includes a conventional interfacecircuit 1024. The interface circuit 1024 may be implemented by any typeof well known interface standard, such as an Ethernet interface, auniversal serial bus (USB), and/or a third generation input/output(3GIO) interface.

One or more input devices 1026 are connected to the interface circuit1024. The input device(s) 1026 permit a user to enter data and commandsinto the processor 1012. The input device(s) can be implemented by, forexample, a keyboard, a mouse, a touchscreen, a track-pad, a trackball,isopoint and/or a voice recognition system.

One or more output devices 1028 are also connected to the interfacecircuit 1024. The output devices 1028 can be implemented, for example,by display devices (e.g., a liquid crystal display, a cathode ray tubedisplay (CRT), a printer and/or speakers). The interface circuit 1024,thus, typically includes a graphics driver card.

The interface circuit 1024 also includes a communication device such asa modem or network interface card to facilitate exchange of data withexternal computers via a network (e.g., an Ethernet connection, adigital subscriber line (DSL), a telephone line, coaxial cable, acellular telephone system, etc.).

The computer platform 1000 also includes one or more mass storagedevices 1030 for storing software and data. Examples of such massstorage devices 1030 include floppy disk drives, hard drive disks,compact disk drives and digital versatile disk (DVD) drives.

At least some of the above described example methods and/or apparatusare implemented by one or more software and/or firmware programs runningon a computer processor. However, dedicated hardware implementationsincluding, but not limited to, application specific integrated circuits,programmable logic arrays and other hardware devices can likewise beconstructed to implement some or all of the example methods and/orapparatus described herein, either in whole or in part. Furthermore,alternative software implementations including, but not limited to,distributed processing or component/object distributed processing,parallel processing, or virtual machine processing can also beconstructed to implement the example methods and/or apparatus describedherein.

It should also be noted that the example software and/or firmwareimplementations described herein are optionally stored on a tangiblestorage medium, such as: a magnetic medium (e.g., a magnetic disk ortape); a magneto-optical or optical medium such as an optical disk; or asolid state medium such as a memory card or other package that housesone or more read-only (non-volatile) memories, random access memories,or other re-writable (volatile) memories. A digital file attached toe-mail or other information archive or set of archives is considered adistribution medium equivalent to a tangible storage medium.Accordingly, the example software and/or firmware described herein canbe stored on a tangible storage medium or distribution medium such asthose described above or successor storage media.

Although this patent discloses example systems including software orfirmware executed on hardware, it should be noted that such systems aremerely illustrative and should not be considered as limiting. Forexample, it is contemplated that any or all of these hardware andsoftware components could be embodied exclusively in hardware,exclusively in software, exclusively in firmware or in some combinationof hardware, firmware and/or software. Accordingly, while the abovespecification described example systems, methods and articles ofmanufacture, persons of ordinary skill in the art will readilyappreciate that the examples are not the only way to implement suchsystems, methods and articles of manufacture. Therefore, althoughcertain example methods, apparatus and articles of manufacture have beendescribed herein, the scope of coverage of this patent is not limitedthereto. On the contrary, this patent covers all methods, apparatus andarticles of manufacture fairly falling within the scope of the appendedclaims either literally or under the doctrine of equivalents.

What is claimed is:
 1. A method for presenting presence information, themethod comprising: in response to a request from a first user forpresence information associated with a second user, analyzing (a)information from a monitoring sensor that is monitoring a physicalenvironment external to a mobile device of the second user, and (b) auser indication of availability from the second user to determine thatthe second user is available for communication with the first user usinga first communication method supported by the mobile device and isunavailable for communication with the first user using a secondcommunication method supported by the mobile device, the informationfrom the monitoring sensor identifying an external environmental factorthat affects a user's availability to communicate using at least one ofthe first communication method and the second communication method; andsending a message to the first user indicating that the second user isavailable for communication using the first communication method and isunavailable for communication using the second communication method. 2.A method as defined in claim 1, wherein the second communication methodis an audio communication method.
 3. A method as defined in claim 2,wherein the first communication method is a text communication method.4. A method as defined in claim 1, wherein the monitoring sensormonitors a noise level.
 5. A method as defined in claim 1, wherein theexternal environmental factor includes an ambience.
 6. A method asdefined in claim 1, wherein analyzing the information from themonitoring sensor to determine that the second user is available forcommunication using the first communication method includes determiningthat the second user is available for communication when the userindication of availability indicates that the second user is availableand the information from the monitoring sensor indicates that the seconduser is available for communication using the first communicationmethod.
 7. A method as defined in claim 1, further including: initiatinga first communication session between the first user and the second userusing the first communication method; receiving a second request from athird user for presence information associated with the second user; inresponse to the second request, determining that the first communicationsession is in progress and determining a first priority stored for thefirst user and a second priority stored for the second user; and inresponse to determining that the first priority is lower than the secondpriority, sending a second message to the third user indicating that thesecond user is available for communication.
 8. An apparatus comprising:a memory including machine readable instructions; and a processor toexecute the instructions to: access a request from a first user forpresence information associated with a second user; analyze (a)information from a monitoring sensor that is monitoring a physicalenvironment external to a mobile device of the second user, and (b) auser indication of availability from the second user to determine thatthe second user is available for communication with the first user usinga first communication method supported by the mobile device and isunavailable for communication with the first user using a secondcommunication method supported by the mobile device, the informationfrom the monitoring sensor identifying an external environmental factorthat affects a user's availability to communicate using at least one ofthe first communication method and the second communication method; andsend a message to the first user indicating that the second user isavailable for communication using the first communication method and isunavailable for communication using the second communication method. 9.An apparatus as defined in claim 8, wherein the second communicationmethod is an audio communication method.
 10. An apparatus as defined inclaim 9, wherein the first communication method is a text communicationmethod.
 11. An apparatus as defined in claim 8, wherein the monitoringsensor is to monitor a noise level.
 12. An apparatus as defined in claim8, wherein the external environmental factor includes an ambience. 13.An apparatus as defined in claim 8, wherein the processor is to executethe instructions to analyze the information from the monitoring sensorto determine that the second user is available for communication usingthe first communication method by determining that the second user isavailable for communication when the user indication of availabilityindicates that the second user is available and the information from themonitoring sensor indicates that the second user is available forcommunication using the first communication method.
 14. An apparatus asdefined in claim 8, wherein the processor is to execute the instructionsto: initiate a first communication session between the first user andthe second user using the first communication method; receive a secondrequest from a third user for presence information associated with thesecond user; in response to the second request, determine that the firstcommunication session is in progress and determine a first prioritystored for the first user and a second priority stored for the seconduser; and in response to determining that the first priority is lowerthan the second priority, send a second message to the third userindicating that the second user is available for communication.
 15. Atangible machine readable storage device comprising instructions which,when executed, cause a machine to perform a method comprising: accessinga request from a first user for presence information associated with asecond user; analyzing (a) information from a monitoring sensor that ismonitoring a physical environment external to a mobile device of thesecond user, and (b) a user indication of availability from the seconduser to determine that the second user is available for communicationwith the first user using a first communication method supported by themobile device and is unavailable for communication with the first userusing a second communication method supported by the mobile device, theinformation from the monitoring sensor identifying an externalenvironmental factor that affects a user's availability to communicateusing at least one of the first communication method and the secondcommunication method; and sending a message to the first user indicatingthat the second user is available for communication using the firstcommunication method and is unavailable for communication using thesecond communication method.
 16. A tangible machine readable storagedevice as defined in claim 15, wherein the second communication methodis an audio communication method.
 17. A tangible machine readablestorage device as defined in claim 16, wherein the first communicationmethod is a text communication method.
 18. A tangible machine readablestorage device as defined in claim 15, wherein the monitoring sensormonitors a noise level.
 19. A tangible machine readable storage deviceas defined in claim 15, wherein the external environmental factorincludes an ambience.
 20. A tangible machine readable storage device asdefined in claim 15, wherein analyzing the information from themonitoring sensor to determine that the second user is available forcommunication using the first communication method includes determiningthat the second user is available for communication when the userindication of availability indicates that the second user is availableand the information from the monitoring sensor indicates that the seconduser is available for communication using the first communicationmethod.
 21. A tangible machine readable storage device as defined inclaim 15, wherein the method includes: initiating a first communicationsession between the first user and the second user using the firstcommunication method; accessing a second request from a third user forpresence information associated with the second user; in response to thesecond request, determining that the first communication session is inprogress and determining a first priority stored for the first user anda second priority stored for the second user; and in response todetermining that the first priority is lower than the second priority,sending a second message to the third user indicating that the seconduser is available for communication.
 22. A method for presentingpresence information, the method comprising: in response to a requestfrom a first user for presence information associated with a seconduser, analyzing information from a monitoring sensor that is monitoringa physical environment associated with a mobile device of the seconduser, and a user indication of availability from the second user todetermine that the second user is available for communication with thefirst user using a first communication method supported by the mobiledevice and is unavailable for communication with the first user using asecond communication method supported by the mobile device; sending amessage to the first user indicating that the second user is availablefor communication using the first communication method and isunavailable for communication using the second communication method; andinitiating a first communication session between the first user and thesecond user using the first communication method; receiving a secondrequest from a third user for presence information associated with thesecond user; in response to the second request, determining that thefirst communication session is in progress and determining a firstpriority stored for the first user and a second priority stored for thesecond user; and in response to determining that the first priority islower than the second priority, sending a message to the third userindicating that the second user is available for communication.
 23. Anapparatus comprising: a memory storing machine readable instructions;and a processor to execute the instructions to: in response to a requestfrom a first user for presence information associated with a seconduser, analyzing\information from a monitoring sensor that is monitoringa physical environment associated with a mobile device of the seconduser, and\a user indication of availability from the second user todetermine that the second user is available for communication with thefirst user using a first communication method supported by the mobiledevice and is unavailable for communication with the first user using asecond communication method supported by the mobile device; sending amessage to the first user indicating that the second user is availablefor communication using the first communication method and isunavailable for communication using the second communication method; andinitiating a first communication session between the first user and thesecond user using the first communication method; receiving a secondrequest from a third user for presence information associated with thesecond user; in response to the second request, determining that thefirst communication session is in progress and determining a firstpriority stored for the first user and a second priority stored for thesecond user; and in response to determining that the first priority islower than the second priority, sending a message to the third userindicating that the second user is available for communication.
 24. Atangible machine readable storage device comprising instructions which,when executed, cause a machine to perform a method comprising: inresponse to a request from a first user for presence informationassociated with a second user, analyzing information from a monitoringsensor that is monitoring a physical environment associated with amobile device of the second user, and a user indication of availabilityfrom the second user to determine that the second user is available forcommunication with the first user using a first communication methodsupported by the mobile device and is unavailable for communication withthe first user using a second communication method supported by themobile device; sending a message to the first user indicating that thesecond user is available for communication using the first communicationmethod and is unavailable for communication using the secondcommunication method; and initiating a first communication sessionbetween the first user and the second user using the first communicationmethod; receiving a second request from a third user for presenceinformation associated with the second user; in response to the secondrequest, determining that the first communication session is in progressand determining a first priority stored for the first user and a secondpriority stored for the second user; and in response to determining thatthe first priority is lower than the second priority, sending a messageto the third user indicating that the second user is available forcommunication.